Ch. 7  Drew Perry

Earth's solid rocky surface

THE THOUGHT THAT MANY ROCKS HAVE FORMED IN A HORIZONTAL FORM

the idea that our continents were once one a super continent

the idea that the sea floor is getting bigger

molted rock in the mantle

THE IDEA THAT EARTH'S SURFACE IS BROKEN UP INTO PLATES

the layer under the Earth's crust

THE SLIDING OF A PLATE UNDER ANOTHER

A huge crack in the Earth's crust

THE POINT WHERE THE EARTHQUAKE STARTS

a vibration that spreads out away from a focus when a earthquake happens

the point on Earth's surface directly above the focus 

shaking after the initial skake

A DEVICE THAT DETECTS EARTH'S MOVEMENT DURING AN EARTHQUAKE

the amount of energy released by an earthquake

opening in a volcano where magma can escape

magma above the crust

a cup like hollow that forms on the top of earthquakes

A HOT SPOT ON THE EARTH'S MANTLE, WHERE MAGMA CAN MELT THE PLATE ABOVE IT

a steep sided cone that forms by exploions of hot rocks

a wide sloped cone that forms from flows of lava 

A VOLCANO FORMED FROM EXPLOSIVE ERUPTIONS OF HOT ROCK THEN LAVA

HEAT FROM BELOW THE EARTH'S SURFACE